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A Body Shape Index (ABSI) is a research metric introduced by Krakauer & Krakauer (2012) that adjusts waist circumference for a person's BMI and height, aiming to isolate how much weight is carried around the waist independent of overall body size. This calculator is for general reference and educational purposes only — it is not a medical diagnosis. Consult a doctor or qualified healthcare professional for an actual health assessment.
How it works
Enter your weight, height, and waist circumference. The tool first calculates your BMI, then divides waist circumference (in meters) by BMI raised to the 2/3 power times the square root of height (in meters), following the published ABSI formula.
- Enter weight (kg).
- Enter height (cm).
- Enter waist circumference (cm).
- Click Calculate to see your results.
Examples
A typical adult ABSI
An 80kg adult at 175cm with an 90cm waist has a BMI of about 26.1 and an ABSI of roughly 0.076 — within the typical published cohort range.
Who should use it
- Exploring a research-grade body-shape metric alongside standard BMI.
- Tracking waist-adjusted body shape over time.
Industry applications
- Public health and epidemiology research
- General wellness tracking
Advantages
- Accounts for waist circumference alongside BMI and height, unlike BMI alone.
- Based on a peer-reviewed, published formula.
Limitations
- Less familiar than BMI, with no single officially adopted clinical cutoff.
- Primarily validated in research/epidemiology contexts rather than individual clinical diagnosis.
Common mistakes to avoid
- Treating a single ABSI value as a diagnosis rather than a research-context reference number.
- Comparing ABSI values without accounting for age and sex, which meaningfully shift typical ranges in the original research.
Best practices
- Use ABSI alongside other measures like waist-to-height ratio and BMI rather than in isolation.
Tips
- Measure waist circumference at the same time of day and body position each time for consistent tracking.